Experiment: 1EV7

CRYSTAL STRUCTURE OF DNA RESTRICTION ENDONUCLEASE NAEI

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICRODIALYSIS	6.1	277	20 mM malaic acid, 20 mM NaCl, 5 mM CaCl2, 1 mM 2-mercaptoethanol, 2% PEG3350, 1.5% ethanol, pH 6.1, MICRODIALYSIS, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.32	47.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.78	α = 90
b = 56.16	β = 95.92
c = 59.05	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	BRANDEIS - B1		1998-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12C		NSLS	X12C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.38	50	88.1	0.055	16.3	2.7	68874	25755		1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.38	2.48	73.7		0.185		2.1	2118

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		2.38	50	23128	25672	2544	79.2	0.2375	0.2347	0.2868	0.2822	Reflections were automatically selected by CNS

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.3
c_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4620
Nucleic Acid Atoms
Solvent Atoms	91
Heterogen Atoms

Software

Software
Software Name	Purpose
SOLVE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling